Qhov sib txawv tseem ceeb ntawm peptide thiab dipeptide yog peptide yog cov saw luv ntawm cov amino acids uas txuas nrog ib leeg ntawm peptide bonds whereas dipeptide yog ib daim ntawv ntawm peptide uas muaj ob qho amino acids koom nrog ib daim ntawv cog lus peptide. los yog ib qho amino acid nrog ob daim ntawv cog lus peptide.
Amino acids yog lub tsev tsim cov proteins. Yog li ntawd, lawv tsim peptide daim ntawv cog lus nrog ib leeg tsim cov saw luv ntawm cov amino acids; Peb hu lawv "peptides". Ntev thiab txuas ntxiv peptide chains yog "polypeptides". Cov chains polypeptide no txuas nrog ib leeg los tsim cov proteins. Lub sij hawm peptide yog ib lo lus uas peb siv los ua lub npe luv luv ntawm cov amino acids, tab sis lub sij hawm dipeptide yog ib lub sij hawm tshwj xeeb uas peb siv rau npe rau ib hom peptides.
YPeptide yog dab tsi?
Peptide yog ib txoj hlua luv ntawm cov amino acids. Cov amino acids txuas nrog ib leeg ntawm peptide linkages (bonds). Cov amino acids yog li lub npe hu ua "monomers". Tsis tas li ntawd, peptide bonds zoo li amide bonds. Cov ntawv cog lus no tsim thaum pawg carboxyl ntawm cov amino acid hnov mob nrog ib pawg amine ntawm lwm cov amino acid. Qhov no yog ib daim ntawv ntawm condensation cov tshuaj tiv thaiv nyob rau hauv uas ib tug dej molecule tso tawm thaum no daim ntawv cog lus. Ntxiv mus, nws yog covalent chemical bond. Muaj ntau lub npe peb siv nrog rau peptides; dipeptides (muaj ob lub amino acids sib txuas rau ib leeg ntawm ib daim ntawv cog lus peptide), tripeptides (muaj peb cov amino acids), thiab lwm yam. Ntxiv rau qhov ntawd, polypeptides ntev, txuas ntxiv peptide chains; lawv tsis yog saws tes, xwb, cov no yog polymers.
Peb tuaj yeem paub qhov txawv ntawm peptide los ntawm cov protein raws li nws qhov loj me. Kwv yees li, yog tias tus naj npawb ntawm cov amino acids hauv peptide yog 50 lossis siab dua, peb hu nws cov protein. Txawm li cas los xij, nws tsis yog ib qho tseem ceeb kom paub qhov txawv ntawm lawv. Piv txwv li, peb xav txog cov protein me me xws li insulin li peptides ntau dua li cov protein.
Daim duab 01: Ib qho tetrapeptide muaj plaub amino acids txuas rau ib leeg ntawm peb daim ntawv cog lus peptide.
Tsis tas li ntawd, peb lub npe amino acids uas koom nrog hauv peptides li "residues". Nws yog vim qhov tso tawm ntawm H + ion (los ntawm amine kawg) los yog OH- ion (los ntawm carboxyl kawg) thaum lub sij hawm tsim ntawm txhua daim ntawv cog lus peptide. Qee zaum, lawv tso ob qho tib si ions ua ke ua cov dej molecule. Tsuas yog rau cyclic peptides, tag nrho lwm cov peptides muaj N terminal (amine kawg) thiab C davhlau ya nyob twg (carboxyl kawg).
YDipeptide yog dab tsi?
A dipeptide yog ib daim ntawv ntawm peptides uas muaj ob qho amino acids txuas rau ib leeg ntawm ib qho peptide khi lossis ib qho amino acid uas muaj ob daim ntawv cog lus peptide. Txawm li cas los xij, nws muaj ob chav sib txawv ntawm cov organic tebchaw. Ob daim ntawv yog raws li nram no;
- Ob lub amino acids nrog ib daim ntawv cog lus peptide - peb pom daim ntawv no ua di-X-peptide lossis X-dipeptide uas "X" tsim cov amino acid. Qee qhov piv txwv ntawm hom no yog Carnosine, Anserine, Homoanserine, Kyotrophin, Balenine, Glorin, thiab lwm yam.
- Ib qho amino acid nrog ob daim ntawv cog lus peptide - Ntawm no, ib qho amino acid muaj ob daim ntawv cog lus me me peptide. Qhov no txhais tau hais tias pawg COOH ntawm C davhlau ya nyob twg ntawm peptide ua COCH3 thaum NH2 pawg N davhlau ya nyob twg ua NHCH3 Ex: alanine dipeptide is CH3CONHCH(CH3)CONHCH3
Ib daim ntawv dipeptide los ntawm kev ua ntawm hydrolase enzyme, dipeptidyl peptidase. Nyob rau hauv peb lub plab zom mov, cov khoom noj protein zom rau hauv dipeptides thiab amino acids. Ntxiv mus, peb lub cev tuaj yeem nqus tau dipeptides sai dua li cov amino acids. Qhov no yog vim lawv qhov nqus tau tshwm sim los ntawm kev sib cais.
Qhov txawv ntawm Peptide thiab Dipeptide yog dab tsi?
Peptide yog ib txoj hlua luv ntawm cov amino acids. Lawv muaj peptide bonds ntawm cov amino acids uas zoo li amide bonds. Tej zaum lawv yuav muaj cov txheej txheem nyuaj heev. Ib dipeptide yog ib daim ntawv ntawm peptides uas muaj ob qho amino acids txuas rau ib leeg ntawm ib qho peptide khi lossis ib qho amino acid uas muaj ob daim ntawv cog lus peptide. Lawv muaj xws li ib daim ntawv cog lus peptide lossis ob daim ntawv cog lus peptide. Ntxiv mus, lawv muaj cov qauv yooj yim. Cov nram qab no infographic nthuav qhia ib sab ntawm kev sib piv ntawm qhov sib txawv ntawm peptide thiab dipeptide.
Summary – Peptide vs Dipeptide
Ib tug dipeptide yog ib daim ntawv ntawm peptides. Ob leeg muaj cov amino acids txuas rau ib leeg ntawm peptide bonds. Qhov sib txawv ntawm peptide thiab dipeptide yog peptide yog cov saw luv ntawm cov amino acids uas txuas nrog ib leeg ntawm peptide bonds whereas dipeptide yog ib daim ntawv ntawm peptide uas muaj ob qho amino acids koom nrog ib daim ntawv cog lus peptide lossis ib qho amino acid nrog ob. peptide daim ntawv cog lus.
